Abstract: Objective To identify the reliability and validity of Chinese version of expanded and revised Gross Motor Function Classification System (GMFCS E&R). Methods 101 children with cerebral palsy aged 6～18 from 2 special schools in Shanghai and Guangzhou participated in this study. The interrater reliability was identified by analyzing the assessment results among different raters, including rehabilitation doctors, physical therapists, teachers and parents. Gross Motor Function Measure (GMFM) was used as the criterion to identify the parallel validity. Results GMFCS E&R had good interrater reliability (ICC=0.79～0.91) as well as the parallel validity (Spearman rank correlation coefficient is -0.46～-0.86). Conclusion Chinese version of GMFCS E&R has good reliability and validity. It is suitable for children with cerebral palsy as the tool of function classification in China.

Key words: cerebral palsy, gross motor function, classification, reliability, validity